What is laughing gas?
The two elements that are frequently used for making transistors are
Actinides are the elements with atomic numbers from
The filament of an electric bulb is made of
Diamond is an allotropic form of
In fireworks, the green flame is produced because of
Permanent hardness of water can be removed by adding
Marsh gas is
LPG consists of mainly
Air is a/an
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
Balloons are filled with
Which of the following does not contain a coinage metal?
Which metal pollute the air of a big city?
Bell metal is an alloy of
Water is a good solvent of ionic salts because
Which of the following is not an isotope of hydrogen?
The main constituents of pearls are
Which of the following is the lightest metal?
Lithium is a soft, silvery white alkali metal. Under standard conditions, Lithium is the lightest metal and lightest solid element.